The shadow of the tower becomes 60 meters longer when the altitude of the sun changes from 45 ° to 30 °. Then the height of the tower is 

Which of the following represents a correct proportion?

The angle of elevation of a tower from a distance 50 m from its foot is 30°. The height of the tower is 

Ram does a work in 40 days and Shyam does same work in 60 days. If efficiency of Mohan is 20% less than the combined efficiency of Ram and Shyam together then working alone Mohan will complete the whole work in how many days?

How many numbers are there from 500 to 650 (including both) which are neither divisible by 3 nor by 7?

The table given below shows the information about bats manufactured by 6 different companies. Each company manufactures only plastic and wooden bats. Each company labels these bats as Brand A or Brand B. The table shows the number of plastic bats as a percentage of total bats manufactured by each company. It also shows the ratio of wooden bats labelled A and B. Each company manufactured a total 550000 bats.

X= Average of plastic bats manufactured by V, U and T.
Y=Wooden bats of Brand A manufactured by V.
What is the value X – Y?

A number divided by 13 leaves a remainder 1 and if the quotient, thus obtained, is divided by 5, we get a remainder of 3. What will be the remainder if the number is divided by 65?

Average age of 6 boys is 14 years. Average age of 11 girls is 12 years. What is the average age (in years) of all boys and girls?